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<title>APZ hit-testing with an inactive scrollframe that is visibility:hidden (bug 1673505)</title>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<meta name="viewport" content="width=device-width"/>
<body style="height: 110vh">
<div style="position:fixed; top:0px; bottom:0px; left:0px; right:0px; visibility:hidden">
<div style="overflow-y: scroll; height: 100vh" id="nested">
<div style="height: 200vh; background-color: red">
The body of this document is scrollable and is the main scrollable
element. On top of that we have a hidden fixed-pos item containing another
scrollframe, but this nested scrollframe is inactive.
Since the fixed-pos item is hidden, the nested scrollframe is hidden
too and shouldn't be the target of hit-testing. However, because it is
an inactive scrollframe, code to generate the "this is an inactive
scrollframe" area was marking it as hit-testable. This bug led to hit-
tests being mis-targeted to the nested scrollframe's layers id instead
of whatever was underneath.
<script type="application/javascript">
function test(testDriver) {
var config = getHitTestConfig();
var utils = config.utils;
let hasViewId;
try {
hasViewId = true;
} catch (e) {
hasViewId = false;
if (!config.activateAllScrollFrames) {
ok(!hasViewId, "The nested scroller should be inactive and not have a view id");
"hit went through the hidden scrollframe");
waitUntilApzStable().then(test).then(subtestDone, subtestFailed);